In a bowl, cut butter into cake mix until crumbly.,Add egg and mix well.,Press cake mixture into a greased 9-in.x13-in.x2-in. baking dish.,Bake at 350 degrees for 15-18 minutes or until set. Cool completely on a wire rack.,In a small mixing bowl, beat cream cheese and confectioners sugar until smooth. Fold in 1 cup of the stabilized whipped cream.,Carefully spread mixture over the cake crust and refrigerate.,In a bowl, whisk the milk and pudding mix for 2 minutes; let stand until slightly thickened.,______,Top with the remaining whipped cream and refrigerate for 2 hours before cutting. Garnish with chocolate curls if desired.